@Nullable @Override public View onCreateView( LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { super.onCreateView(inflater, container, savedInstanceState); View view = inflater.inflate(R.layout.fragment_schedule, container, false); scheduleView = (RecyclerView) view.findViewById(R.id.schedule); swipeRefreshLayout = (SwipeRefreshLayout) view.findViewById(R.id.swipeContainer); mActivity = getActivity(); scheduleView.setLayoutManager(new LinearLayoutManager(mActivity)); scheduleView.setItemAnimator(new DefaultItemAnimator()); swipeRefreshLayout.setEnabled(false); swipeRefreshLayout.post( new Runnable() { @Override public void run() { swipeRefreshLayout.setRefreshing(true); } }); Call<List<Room>> roomCall = COSCUPClient.get().room(); roomCall.enqueue( new Callback<List<Room>>() { @Override public void onResponse(Call<List<Room>> call, Response<List<Room>> response) { if (response.isSuccessful()) { List<Room> rooms = response.body(); HashMap<String, String> roomMap = new HashMap(); for (Room room : rooms) { roomMap.put(room.getRoom(), room.getName()); } getType(roomMap); } else { loadOfflineScedule(); } } @Override public void onFailure(Call<List<Room>> call, Throwable t) { loadOfflineScedule(); } }); return view; }